霜霉威对黄瓜苗期猝倒病的控制作用研究

Studies on the Control of Propamocarb against Pythium aphanidermatum and Damping-off on Cucumber Seedling

采用菌丝生长速率法测得霜霉威对引起黄瓜猝倒病的瓜果腐霉菌的EC50为35.3018mg/L。黄瓜苗期猝倒病的田间药效试验结果表明,72.2%霜霉威水剂在使用剂量为5.0～7.5g/m2时对该病的防治效果为72.35%～80.20%,且对黄瓜安全,是控制黄瓜猝倒病的有效药剂。

The EC50 of propomocarb on Pythium aphanidermatum was 35.301 8 mg/L tested with mycelium growing inhibition method. The control experiment of 72.2% propamocarb aqueous solution against cucumber seedling damping-off was carried. The results showed that the control effects were 72.35% to 80,20% at the dosage of 5.0-7.5 g/m^2.